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MOLYKOTE® D-321 R Anti-Friction Coating - Anti-Friction Coating - Transportation & Industrial

MOLYKOTE® D-321 R Anti-Friction Coating – Anti-Friction Coating – Transportation & Industrial

  • -Item Name: MOLYKOTE® D-321 R Anti-Friction Coating
  • -Manufacturer: DuPont
  • -Technologies: Air-curing dry-film lubricant formulated with solid lubricants, solvents, and binder
  • -Color: Gray-black
  • -Cure Type: Air drying
  • -Package Size: Contact to Techniq VN for details.
  • -Shelf Life: 24 months
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1. Product Overview

MOLYKOTE® D-321 R is an air-curing dry-film lubricant available in bulk liquid or aerosolized spray form. It is designed for metal-to-metal applications requiring high load resistance, wear protection, and reduced friction.

Key Features:

  • Air drying
  • Prevents stick-slip
  • High aging resistance
  • No intentional PTFE or PFAS
  • Provides emergency boundary lubrication

Composition:

  • Solid lubricants
  • Solvents
  • Binder

2. Applications

  • Lubrication of metal/metal combinations with slow to medium-fast movements under high loads
  • Used in plain bearings, bushings, sleeves, power screw drives, and threaded connections
  • Suitable for high-voltage switches, slides, guides, and tracks
  • Aerosolized spray is ideal for hard-to-reach surfaces, chains, and multi-purpose applications

3. Typical Properties

Property Test Standard Unit Result
Color – – Gray-black
Physical Properties
Viscosity at 23°C (#3 cup) ISO 2431 sec 23
Density at 20°C DIN 53217/2 g/mL 1.07
Nonvolatile Content CTM 0242 I % 29
Temperature Resistance °C -180 to 450
Load-Carrying Capacity & Wear Protection
Falex Load-Carrying Capacity ASTM D2625 N b = 4,500, p = 12,500, s = 6,800
LFW-1, Rotating Wear Test ASTM D2714 No. of revolutions (x1,000) to µ = 0.1 b = 212, p = 146, s = 306

Note:

  • b = blank surface
  • p = phosphated surface
  • s = sandblasted surface

4. Usage & Application

Surface Preparation:

  • Clean and degrease the surface before application
  • Phosphatization or sandblasting (180 grit) improves adhesion and service life

Application Method:

  • Stir or roll bulk liquid thoroughly before applying by brush or spray
  • Shake aerosolized cans well before use and apply in a sweeping motion
  • Recommended dry-film thickness: 5 to 20 µm

Drying & Curing Time:

  • Touch-dry: 5 minutes at 23°C (or 1 minute with hot air at 80°C)
  • Fully cured: 2 hours at 23°C

Solubility & Thinning:

  • Can be thinned with MOLYKOTE® L-13 Thinner
TDS:
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